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Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2

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* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2: (21 commits)
  ocfs2: Check search result in ocfs2_xattr_block_get()
  ocfs2: fix printk related build warnings in xattr.c
  ocfs2: truncate outstanding block after direct io failure
  ocfs2/xattr: Proper hash collision handle in bucket division
  ocfs2: return 0 in page_mkwrite to let VFS retry.
  ocfs2: Set journal descriptor to NULL after journal shutdown
  ocfs2: Fix check of return value of ocfs2_start_trans() in xattr.c.
  ocfs2: Let inode be really deleted when ocfs2_mknod_locked() fails
  ocfs2: Fix checking of return value of new_inode()
  ocfs2: Fix check of return value of ocfs2_start_trans()
  ocfs2: Fix some typos in xattr annotations.
  ocfs2: Remove unused ocfs2_restore_xattr_block().
  ocfs2: Don't repeat ocfs2_xattr_block_find()
  ocfs2: Specify appropriate journal access for new xattr buckets.
  ocfs2: Check errors from ocfs2_xattr_update_xattr_search()
  ocfs2: Don't return -EFAULT from a corrupt xattr entry.
  ocfs2: Check xattr block signatures properly.
  ocfs2: add handler_map array bounds checking
  ocfs2: remove duplicate definition in xattr
  ocfs2: fix function declaration and definition in xattr
  ...
This commit is contained in:
Linus Torvalds 2008-11-11 09:31:32 -08:00
commit ad1164b79f
9 changed files with 257 additions and 223 deletions
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27
fs/ocfs2/file.c
View File

@ -247,8 +247,8 @@ int ocfs2_update_inode_atime(struct inode *inode,
mlog_entry_void();
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
if (handle == NULL) {
ret = -ENOMEM;
if (IS_ERR(handle)) {
ret = PTR_ERR(handle);
mlog_errno(ret);
goto out;
}
@ -312,8 +312,8 @@ static int ocfs2_simple_size_update(struct inode *inode,
handle_t *handle = NULL;
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
if (handle == NULL) {
ret = -ENOMEM;
if (IS_ERR(handle)) {
ret = PTR_ERR(handle);
mlog_errno(ret);
goto out;
}
@ -1055,8 +1055,8 @@ static int __ocfs2_write_remove_suid(struct inode *inode,
(unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode);
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
if (handle == NULL) {
ret = -ENOMEM;
if (IS_ERR(handle)) {
ret = PTR_ERR(handle);
mlog_errno(ret);
goto out;
}
@ -1259,8 +1259,8 @@ static int __ocfs2_remove_inode_range(struct inode *inode,
}
handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS);
if (handle == NULL) {
ret = -ENOMEM;
if (IS_ERR(handle)) {
ret = PTR_ERR(handle);
mlog_errno(ret);
goto out;
}
@ -1352,8 +1352,8 @@ static int ocfs2_zero_partial_clusters(struct inode *inode,
goto out;
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
if (handle == NULL) {
ret = -ENOMEM;
if (IS_ERR(handle)) {
ret = PTR_ERR(handle);
mlog_errno(ret);
goto out;
}
@ -1866,6 +1866,13 @@ static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos,
ppos, count, ocount);
if (written < 0) {
/*
* direct write may have instantiated a few
* blocks outside i_size. Trim these off again.
* Don't need i_size_read because we hold i_mutex.
*/
if (*ppos + count > inode->i_size)
vmtruncate(inode, inode->i_size);
ret = written;
goto out_dio;
}

6
fs/ocfs2/inode.c
View File

@ -1106,6 +1106,12 @@ void ocfs2_clear_inode(struct inode *inode)
oi->ip_last_trans = 0;
oi->ip_dir_start_lookup = 0;
oi->ip_blkno = 0ULL;
/*
* ip_jinode is used to track txns against this inode. We ensure that
* the journal is flushed before journal shutdown. Thus it is safe to
* have inodes get cleaned up after journal shutdown.
*/
jbd2_journal_release_jbd_inode(OCFS2_SB(inode->i_sb)->journal->j_journal,
&oi->ip_jinode);

1
fs/ocfs2/journal.c
View File

@ -690,6 +690,7 @@ void ocfs2_journal_shutdown(struct ocfs2_super *osb)
/* Shutdown the kernel journal system */
jbd2_journal_destroy(journal->j_journal);
journal->j_journal = NULL;
OCFS2_I(inode)->ip_open_count--;

6
fs/ocfs2/mmap.c
View File

@ -113,7 +113,11 @@ static int __ocfs2_page_mkwrite(struct inode *inode, struct buffer_head *di_bh,
* ocfs2_write_begin_nolock().
*/
if (!PageUptodate(page) || page->mapping != inode->i_mapping) {
ret = -EINVAL;
/*
* the page has been umapped in ocfs2_data_downconvert_worker.
* So return 0 here and let VFS retry.
*/
ret = 0;
goto out;
}

8
fs/ocfs2/namei.c
View File

@ -378,8 +378,8 @@ static int ocfs2_mknod_locked(struct ocfs2_super *osb,
}
inode = new_inode(dir->i_sb);
if (IS_ERR(inode)) {
status = PTR_ERR(inode);
if (!inode) {
status = -ENOMEM;
mlog(ML_ERROR, "new_inode failed!\n");
goto leave;
}
@ -491,8 +491,10 @@ static int ocfs2_mknod_locked(struct ocfs2_super *osb,
brelse(*new_fe_bh);
*new_fe_bh = NULL;
}
if (inode)
if (inode) {
clear_nlink(inode);
iput(inode);
}
}
mlog_exit(status);

3
fs/ocfs2/ocfs2.h
View File

@ -473,6 +473,9 @@ static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb)
(____gd)->bg_signature); \
} while (0)
#define OCFS2_IS_VALID_XATTR_BLOCK(ptr) \
(!strcmp((ptr)->xb_signature, OCFS2_XATTR_BLOCK_SIGNATURE))
static inline unsigned long ino_from_blkno(struct super_block *sb,
u64 blkno)
{

17
fs/ocfs2/ocfs2_fs.h
View File

@ -742,12 +742,12 @@ struct ocfs2_group_desc
*/
struct ocfs2_xattr_entry {
__le32 xe_name_hash; /* hash value of xattr prefix+suffix. */
__le16 xe_name_offset; /* byte offset from the 1st etnry in the local
__le16 xe_name_offset; /* byte offset from the 1st entry in the
local xattr storage(inode, xattr block or
xattr bucket). */
__u8 xe_name_len; /* xattr name len, does't include prefix. */
__u8 xe_type; /* the low 7 bits indicates the name prefix's
* type and the highest 1 bits indicate whether
__u8 xe_type; /* the low 7 bits indicate the name prefix
* type and the highest bit indicates whether
* the EA is stored in the local storage. */
__le64 xe_value_size; /* real xattr value length. */
};
@ -766,9 +766,10 @@ struct ocfs2_xattr_header {
xattr. */
__le16 xh_name_value_len; /* total length of name/value
length in this bucket. */
__le16 xh_num_buckets; /* bucket nums in one extent
record, only valid in the
first bucket. */
__le16 xh_num_buckets; /* Number of xattr buckets
in this extent record,
only valid in the first
bucket. */
__le64 xh_csum;
struct ocfs2_xattr_entry xh_entries[0]; /* xattr entry list. */
};
@ -776,8 +777,8 @@ struct ocfs2_xattr_header {
/*
* On disk structure for xattr value root.
*
* It is used when one extended attribute's size is larger, and we will save it
* in an outside cluster. It will stored in a b-tree like file content.
* When an xattr's value is large enough, it is stored in an external
* b-tree like file data. The xattr value root points to this structure.
*/
struct ocfs2_xattr_value_root {
/*00*/ __le32 xr_clusters; /* clusters covered by xattr value. */

374
fs/ocfs2/xattr.c
View File

@ -3,25 +3,20 @@
*
* xattr.c
*
* Copyright (C) 2008 Oracle. All rights reserved.
* Copyright (C) 2004, 2008 Oracle. All rights reserved.
*
* CREDITS:
* Lots of code in this file is taken from ext3.
* Lots of code in this file is copy from linux/fs/ext3/xattr.c.
* Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
* License version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#include <linux/capability.h>
@ -83,7 +78,7 @@ struct xattr_handler *ocfs2_xattr_handlers[] = {
NULL
};
static struct xattr_handler *ocfs2_xattr_handler_map[] = {
static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = {
[OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler,
[OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler,
};
@ -116,6 +111,10 @@ static int ocfs2_xattr_bucket_get_name_value(struct inode *inode,
int *block_off,
int *new_offset);
static int ocfs2_xattr_block_find(struct inode *inode,
int name_index,
const char *name,
struct ocfs2_xattr_search *xs);
static int ocfs2_xattr_index_block_find(struct inode *inode,
struct buffer_head *root_bh,
int name_index,
@ -137,6 +136,24 @@ static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
static int ocfs2_delete_xattr_index_block(struct inode *inode,
struct buffer_head *xb_bh);
static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb)
{
return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE;
}
static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb)
{
return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits);
}
static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb)
{
u16 len = sb->s_blocksize -
offsetof(struct ocfs2_xattr_header, xh_entries);
return len / sizeof(struct ocfs2_xattr_entry);
}
static inline const char *ocfs2_xattr_prefix(int name_index)
{
struct xattr_handler *handler = NULL;
@ -542,14 +559,12 @@ static int ocfs2_xattr_block_list(struct inode *inode,
mlog_errno(ret);
return ret;
}
/*Verify the signature of xattr block*/
if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE,
strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) {
ret = -EFAULT;
goto cleanup;
}
xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) {
ret = -EIO;
goto cleanup;
}
if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header;
@ -749,47 +764,25 @@ static int ocfs2_xattr_block_get(struct inode *inode,
size_t buffer_size,
struct ocfs2_xattr_search *xs)
{
struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
struct buffer_head *blk_bh = NULL;
struct ocfs2_xattr_block *xb;
struct ocfs2_xattr_value_root *xv;
size_t size;
int ret = -ENODATA, name_offset, name_len, block_off, i;
if (!di->i_xattr_loc)
return ret;
memset(&xs->bucket, 0, sizeof(xs->bucket));
ret = ocfs2_read_block(inode, le64_to_cpu(di->i_xattr_loc), &blk_bh);
if (ret < 0) {
ret = ocfs2_xattr_block_find(inode, name_index, name, xs);
if (ret) {
mlog_errno(ret);
return ret;
}
/*Verify the signature of xattr block*/
if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE,
strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) {
ret = -EFAULT;
goto cleanup;
}
xs->xattr_bh = blk_bh;
xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
xs->header = &xb->xb_attrs.xb_header;
xs->base = (void *)xs->header;
xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size;
xs->here = xs->header->xh_entries;
ret = ocfs2_xattr_find_entry(name_index, name, xs);
} else
ret = ocfs2_xattr_index_block_find(inode, blk_bh,
name_index,
name, xs);
if (ret)
if (xs->not_found) {
ret = -ENODATA;
goto cleanup;
}
xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
size = le64_to_cpu(xs->here->xe_value_size);
if (buffer) {
ret = -ERANGE;
@ -828,7 +821,8 @@ static int ocfs2_xattr_block_get(struct inode *inode,
brelse(xs->bucket.bhs[i]);
memset(&xs->bucket, 0, sizeof(xs->bucket));
brelse(blk_bh);
brelse(xs->xattr_bh);
xs->xattr_bh = NULL;
return ret;
}
@ -837,11 +831,11 @@ static int ocfs2_xattr_block_get(struct inode *inode,
* Copy an extended attribute into the buffer provided.
* Buffer is NULL to compute the size of buffer required.
*/
int ocfs2_xattr_get(struct inode *inode,
int name_index,
const char *name,
void *buffer,
size_t buffer_size)
static int ocfs2_xattr_get(struct inode *inode,
int name_index,
const char *name,
void *buffer,
size_t buffer_size)
{
int ret;
struct ocfs2_dinode *di = NULL;
@ -871,7 +865,7 @@ int ocfs2_xattr_get(struct inode *inode,
down_read(&oi->ip_xattr_sem);
ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer,
buffer_size, &xis);
if (ret == -ENODATA)
if (ret == -ENODATA && di->i_xattr_loc)
ret = ocfs2_xattr_block_get(inode, name_index, name, buffer,
buffer_size, &xbs);
up_read(&oi->ip_xattr_sem);
@ -1229,7 +1223,7 @@ static int ocfs2_xattr_set_entry(struct inode *inode,
free = min_offs - ((void *)last - xs->base) - sizeof(__u32);
if (free < 0)
return -EFAULT;
return -EIO;
if (!xs->not_found) {
size_t size = 0;
@ -1514,10 +1508,9 @@ static int ocfs2_xattr_free_block(struct inode *inode,
goto out;
}
/*Verify the signature of xattr block*/
if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE,
strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) {
ret = -EFAULT;
xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) {
ret = -EIO;
goto out;
}
@ -1527,7 +1520,6 @@ static int ocfs2_xattr_free_block(struct inode *inode,
goto out;
}
xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
blk = le64_to_cpu(xb->xb_blkno);
bit = le16_to_cpu(xb->xb_suballoc_bit);
bg_blkno = ocfs2_which_suballoc_group(blk, bit);
@ -1771,15 +1763,14 @@ static int ocfs2_xattr_block_find(struct inode *inode,
mlog_errno(ret);
return ret;
}
/*Verify the signature of xattr block*/
if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE,
strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) {
ret = -EFAULT;
goto cleanup;
xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) {
ret = -EIO;
goto cleanup;
}
xs->xattr_bh = blk_bh;
xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
xs->header = &xb->xb_attrs.xb_header;
@ -1805,52 +1796,6 @@ static int ocfs2_xattr_block_find(struct inode *inode,
return ret;
}
/*
* When all the xattrs are deleted from index btree, the ocfs2_xattr_tree
* will be erased and ocfs2_xattr_block will have its ocfs2_xattr_header
* re-initialized.
*/
static int ocfs2_restore_xattr_block(struct inode *inode,
struct ocfs2_xattr_search *xs)
{
int ret;
handle_t *handle;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct ocfs2_xattr_block *xb =
(struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list;
u16 xb_flags = le16_to_cpu(xb->xb_flags);
BUG_ON(!(xb_flags & OCFS2_XATTR_INDEXED) ||
le16_to_cpu(el->l_next_free_rec) != 0);
handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_UPDATE_CREDITS);
if (IS_ERR(handle)) {
ret = PTR_ERR(handle);
handle = NULL;
goto out;
}
ret = ocfs2_journal_access(handle, inode, xs->xattr_bh,
OCFS2_JOURNAL_ACCESS_WRITE);
if (ret < 0) {
mlog_errno(ret);
goto out_commit;
}
memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize -
offsetof(struct ocfs2_xattr_block, xb_attrs));
xb->xb_flags = cpu_to_le16(xb_flags & ~OCFS2_XATTR_INDEXED);
ocfs2_journal_dirty(handle, xs->xattr_bh);
out_commit:
ocfs2_commit_trans(osb, handle);
out:
return ret;
}
/*
* ocfs2_xattr_block_set()
*
@ -1961,8 +1906,6 @@ static int ocfs2_xattr_block_set(struct inode *inode,
}
ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs);
if (!ret && xblk->xb_attrs.xb_root.xt_list.l_next_free_rec == 0)
ret = ocfs2_restore_xattr_block(inode, xs);
end:
@ -2398,7 +2341,8 @@ static int ocfs2_xattr_index_block_find(struct inode *inode,
BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash);
mlog(0, "find xattr extent rec %u clusters from %llu, the first hash "
"in the rec is %u\n", num_clusters, p_blkno, first_hash);
"in the rec is %u\n", num_clusters, (unsigned long long)p_blkno,
first_hash);
ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash,
p_blkno, first_hash, num_clusters, xs);
@ -2422,7 +2366,7 @@ static int ocfs2_iterate_xattr_buckets(struct inode *inode,
memset(&bucket, 0, sizeof(bucket));
mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n",
clusters, blkno);
clusters, (unsigned long long)blkno);
for (i = 0; i < num_buckets; i++, blkno += blk_per_bucket) {
ret = ocfs2_read_blocks(inode, blkno, blk_per_bucket,
@ -2440,7 +2384,8 @@ static int ocfs2_iterate_xattr_buckets(struct inode *inode,
if (i == 0)
num_buckets = le16_to_cpu(bucket.xh->xh_num_buckets);
mlog(0, "iterating xattr bucket %llu, first hash %u\n", blkno,
mlog(0, "iterating xattr bucket %llu, first hash %u\n",
(unsigned long long)blkno,
le32_to_cpu(bucket.xh->xh_entries[0].xe_name_hash));
if (func) {
ret = func(inode, &bucket, para);
@ -2776,7 +2721,8 @@ static int ocfs2_xattr_create_index_block(struct inode *inode,
*/
blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off);
mlog(0, "allocate 1 cluster from %llu to xattr block\n", blkno);
mlog(0, "allocate 1 cluster from %llu to xattr block\n",
(unsigned long long)blkno);
xh_bh = sb_getblk(inode->i_sb, blkno);
if (!xh_bh) {
@ -2818,7 +2764,11 @@ static int ocfs2_xattr_create_index_block(struct inode *inode,
if (data_bh)
ocfs2_journal_dirty(handle, data_bh);
ocfs2_xattr_update_xattr_search(inode, xs, xb_bh, xh_bh);
ret = ocfs2_xattr_update_xattr_search(inode, xs, xb_bh, xh_bh);
if (ret) {
mlog_errno(ret);
goto out_commit;
}
/* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */
memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize -
@ -2941,8 +2891,8 @@ static int ocfs2_defrag_xattr_bucket(struct inode *inode,
mlog(0, "adjust xattr bucket in %llu, count = %u, "
"xh_free_start = %u, xh_name_value_len = %u.\n",
blkno, le16_to_cpu(xh->xh_count), xh_free_start,
le16_to_cpu(xh->xh_name_value_len));
(unsigned long long)blkno, le16_to_cpu(xh->xh_count),
xh_free_start, le16_to_cpu(xh->xh_name_value_len));
/*
* sort all the entries by their offset.
@ -3058,7 +3008,7 @@ static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode,
prev_blkno += (num_clusters - 1) * bpc + bpc / 2;
mlog(0, "move half of xattrs in cluster %llu to %llu\n",
prev_blkno, new_blkno);
(unsigned long long)prev_blkno, (unsigned long long)new_blkno);
/*
* We need to update the 1st half of the new cluster and
@ -3168,26 +3118,74 @@ static int ocfs2_read_xattr_bucket(struct inode *inode,
}
/*
* Move half num of the xattrs in old bucket(blk) to new bucket(new_blk).
* first_hash will record the 1st hash of the new bucket.
* Find the suitable pos when we divide a bucket into 2.
* We have to make sure the xattrs with the same hash value exist
* in the same bucket.
*
* If this ocfs2_xattr_header covers more than one hash value, find a
* place where the hash value changes. Try to find the most even split.
* The most common case is that all entries have different hash values,
* and the first check we make will find a place to split.
*/
static int ocfs2_half_xattr_bucket(struct inode *inode,
handle_t *handle,
u64 blk,
u64 new_blk,
u32 *first_hash,
int new_bucket_head)
static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh)
{
struct ocfs2_xattr_entry *entries = xh->xh_entries;
int count = le16_to_cpu(xh->xh_count);
int delta, middle = count / 2;
/*
* We start at the middle. Each step gets farther away in both
* directions. We therefore hit the change in hash value
* nearest to the middle. Note that this loop does not execute for
* count < 2.
*/
for (delta = 0; delta < middle; delta++) {
/* Let's check delta earlier than middle */
if (cmp_xe(&entries[middle - delta - 1],
&entries[middle - delta]))
return middle - delta;
/* For even counts, don't walk off the end */
if ((middle + delta + 1) == count)
continue;
/* Now try delta past middle */
if (cmp_xe(&entries[middle + delta],
&entries[middle + delta + 1]))
return middle + delta + 1;
}
/* Every entry had the same hash */
return count;
}
/*
* Move some xattrs in old bucket(blk) to new bucket(new_blk).
* first_hash will record the 1st hash of the new bucket.
*
* Normally half of the xattrs will be moved. But we have to make
* sure that the xattrs with the same hash value are stored in the
* same bucket. If all the xattrs in this bucket have the same hash
* value, the new bucket will be initialized as an empty one and the
* first_hash will be initialized as (hash_value+1).
*/
static int ocfs2_divide_xattr_bucket(struct inode *inode,
handle_t *handle,
u64 blk,
u64 new_blk,
u32 *first_hash,
int new_bucket_head)
{
int ret, i;
u16 count, start, len, name_value_len, xe_len, name_offset;
int count, start, len, name_value_len = 0, xe_len, name_offset = 0;
u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
struct buffer_head **s_bhs, **t_bhs = NULL;
struct ocfs2_xattr_header *xh;
struct ocfs2_xattr_entry *xe;
int blocksize = inode->i_sb->s_blocksize;
mlog(0, "move half of xattrs from bucket %llu to %llu\n",
blk, new_blk);
mlog(0, "move some of xattrs from bucket %llu to %llu\n",
(unsigned long long)blk, (unsigned long long)new_blk);
s_bhs = kcalloc(blk_per_bucket, sizeof(struct buffer_head *), GFP_NOFS);
if (!s_bhs)
@ -3220,21 +3218,44 @@ static int ocfs2_half_xattr_bucket(struct inode *inode,
for (i = 0; i < blk_per_bucket; i++) {
ret = ocfs2_journal_access(handle, inode, t_bhs[i],
OCFS2_JOURNAL_ACCESS_CREATE);
new_bucket_head ?
OCFS2_JOURNAL_ACCESS_CREATE :
OCFS2_JOURNAL_ACCESS_WRITE);
if (ret) {
mlog_errno(ret);
goto out;
}
}
xh = (struct ocfs2_xattr_header *)s_bhs[0]->b_data;
count = le16_to_cpu(xh->xh_count);
start = ocfs2_xattr_find_divide_pos(xh);
if (start == count) {
xe = &xh->xh_entries[start-1];
/*
* initialized a new empty bucket here.
* The hash value is set as one larger than
* that of the last entry in the previous bucket.
*/
for (i = 0; i < blk_per_bucket; i++)
memset(t_bhs[i]->b_data, 0, blocksize);
xh = (struct ocfs2_xattr_header *)t_bhs[0]->b_data;
xh->xh_free_start = cpu_to_le16(blocksize);
xh->xh_entries[0].xe_name_hash = xe->xe_name_hash;
le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1);
goto set_num_buckets;
}
/* copy the whole bucket to the new first. */
for (i = 0; i < blk_per_bucket; i++)
memcpy(t_bhs[i]->b_data, s_bhs[i]->b_data, blocksize);
/* update the new bucket. */
xh = (struct ocfs2_xattr_header *)t_bhs[0]->b_data;
count = le16_to_cpu(xh->xh_count);
start = count / 2;
/*
* Calculate the total name/value len and xh_free_start for
@ -3291,6 +3312,7 @@ static int ocfs2_half_xattr_bucket(struct inode *inode,
xh->xh_free_start = xe->xe_name_offset;
}
set_num_buckets:
/* set xh->xh_num_buckets for the new xh. */
if (new_bucket_head)
xh->xh_num_buckets = cpu_to_le16(1);
@ -3308,9 +3330,13 @@ static int ocfs2_half_xattr_bucket(struct inode *inode,
*first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash);
/*
* Now only update the 1st block of the old bucket.
* Please note that the entry has been sorted already above.
* Now only update the 1st block of the old bucket. If we
* just added a new empty bucket, there is no need to modify
* it.
*/
if (start == count)
goto out;
xh = (struct ocfs2_xattr_header *)s_bhs[0]->b_data;
memset(&xh->xh_entries[start], 0,
sizeof(struct ocfs2_xattr_entry) * (count - start));
@ -3358,7 +3384,8 @@ static int ocfs2_cp_xattr_bucket(struct inode *inode,
BUG_ON(s_blkno == t_blkno);
mlog(0, "cp bucket %llu to %llu, target is %d\n",
s_blkno, t_blkno, t_is_new);
(unsigned long long)s_blkno, (unsigned long long)t_blkno,
t_is_new);
s_bhs = kzalloc(sizeof(struct buffer_head *) * blk_per_bucket,
GFP_NOFS);
@ -3382,6 +3409,8 @@ static int ocfs2_cp_xattr_bucket(struct inode *inode,
for (i = 0; i < blk_per_bucket; i++) {
ret = ocfs2_journal_access(handle, inode, t_bhs[i],
t_is_new ?
OCFS2_JOURNAL_ACCESS_CREATE :
OCFS2_JOURNAL_ACCESS_WRITE);
if (ret)
goto out;
@ -3428,7 +3457,8 @@ static int ocfs2_cp_xattr_cluster(struct inode *inode,
struct ocfs2_xattr_header *xh;
u64 to_blk_start = to_blk;
mlog(0, "cp xattrs from cluster %llu to %llu\n", src_blk, to_blk);
mlog(0, "cp xattrs from cluster %llu to %llu\n",
(unsigned long long)src_blk, (unsigned long long)to_blk);
/*
* We need to update the new cluster and 1 more for the update of
@ -3493,15 +3523,15 @@ static int ocfs2_cp_xattr_cluster(struct inode *inode,
}
/*
* Move half of the xattrs in this cluster to the new cluster.
* Move some xattrs in this cluster to the new cluster.
* This function should only be called when bucket size == cluster size.
* Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead.
*/
static int ocfs2_half_xattr_cluster(struct inode *inode,
handle_t *handle,
u64 prev_blk,
u64 new_blk,
u32 *first_hash)
static int ocfs2_divide_xattr_cluster(struct inode *inode,
handle_t *handle,
u64 prev_blk,
u64 new_blk,
u32 *first_hash)
{
u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
int ret, credits = 2 * blk_per_bucket;
@ -3515,8 +3545,8 @@ static int ocfs2_half_xattr_cluster(struct inode *inode,
}
/* Move half of the xattr in start_blk to the next bucket. */
return ocfs2_half_xattr_bucket(inode, handle, prev_blk,
new_blk, first_hash, 1);
return ocfs2_divide_xattr_bucket(inode, handle, prev_blk,
new_blk, first_hash, 1);
}
/*
@ -3559,7 +3589,8 @@ static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode,
int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n",
prev_blk, prev_clusters, new_blk);
(unsigned long long)prev_blk, prev_clusters,
(unsigned long long)new_blk);
if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1)
ret = ocfs2_mv_xattr_bucket_cross_cluster(inode,
@ -3578,9 +3609,9 @@ static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode,
last_blk, new_blk,
v_start);
else {
ret = ocfs2_half_xattr_cluster(inode, handle,
last_blk, new_blk,
v_start);
ret = ocfs2_divide_xattr_cluster(inode, handle,
last_blk, new_blk,
v_start);
if ((*header_bh)->b_blocknr == last_blk && extend)
*extend = 0;
@ -3629,7 +3660,7 @@ static int ocfs2_add_new_xattr_cluster(struct inode *inode,
mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, "
"previous xattr blkno = %llu\n",
(unsigned long long)OCFS2_I(inode)->ip_blkno,
prev_cpos, prev_blkno);
prev_cpos, (unsigned long long)prev_blkno);
ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh);
@ -3716,7 +3747,7 @@ static int ocfs2_add_new_xattr_cluster(struct inode *inode,
}
}
mlog(0, "Insert %u clusters at block %llu for xattr at %u\n",
num_bits, block, v_start);
num_bits, (unsigned long long)block, v_start);
ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block,
num_bits, 0, meta_ac);
if (ret < 0) {
@ -3761,7 +3792,7 @@ static int ocfs2_extend_xattr_bucket(struct inode *inode,
u16 bucket = le16_to_cpu(first_xh->xh_num_buckets);
mlog(0, "extend xattr bucket in %llu, xattr extend rec starting "
"from %llu, len = %u\n", start_blk,
"from %llu, len = %u\n", (unsigned long long)start_blk,
(unsigned long long)first_bh->b_blocknr, num_clusters);
BUG_ON(bucket >= num_buckets);
@ -3797,8 +3828,8 @@ static int ocfs2_extend_xattr_bucket(struct inode *inode,
}
/* Move half of the xattr in start_blk to the next bucket. */
ret = ocfs2_half_xattr_bucket(inode, handle, start_blk,
start_blk + blk_per_bucket, NULL, 0);
ret = ocfs2_divide_xattr_bucket(inode, handle, start_blk,
start_blk + blk_per_bucket, NULL, 0);
le16_add_cpu(&first_xh->xh_num_buckets, 1);
ocfs2_journal_dirty(handle, first_bh);
@ -4146,7 +4177,7 @@ static int ocfs2_xattr_value_update_size(struct inode *inode,
handle_t *handle = NULL;
handle = ocfs2_start_trans(osb, 1);
if (handle == NULL) {
if (IS_ERR(handle)) {
ret = -ENOMEM;
mlog_errno(ret);
goto out;
@ -4313,7 +4344,7 @@ static int ocfs2_rm_xattr_cluster(struct inode *inode,
}
handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS);
if (handle == NULL) {
if (IS_ERR(handle)) {
ret = -ENOMEM;
mlog_errno(ret);
goto out;
@ -4489,11 +4520,21 @@ static int ocfs2_xattr_set_in_bucket(struct inode *inode,
return ret;
}
/* check whether the xattr bucket is filled up with the same hash value. */
/*
* check whether the xattr bucket is filled up with the same hash value.
* If we want to insert the xattr with the same hash, return -ENOSPC.
* If we want to insert a xattr with different hash value, go ahead
* and ocfs2_divide_xattr_bucket will handle this.
*/
static int ocfs2_check_xattr_bucket_collision(struct inode *inode,
struct ocfs2_xattr_bucket *bucket)
struct ocfs2_xattr_bucket *bucket,
const char *name)
{
struct ocfs2_xattr_header *xh = bucket->xh;
u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash))
return 0;
if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash ==
xh->xh_entries[0].xe_name_hash) {
@ -4616,7 +4657,9 @@ static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
* one bucket's worth, so check it here whether we need to
* add a new bucket for the insert.
*/
ret = ocfs2_check_xattr_bucket_collision(inode, &xs->bucket);
ret = ocfs2_check_xattr_bucket_collision(inode,
&xs->bucket,
xi->name);
if (ret) {
mlog_errno(ret);
goto out;
@ -4727,14 +4770,11 @@ static int ocfs2_delete_xattr_index_block(struct inode *inode,
/*
* 'trusted' attributes support
*/
#define XATTR_TRUSTED_PREFIX "trusted."
static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list,
size_t list_size, const char *name,
size_t name_len)
{
const size_t prefix_len = sizeof(XATTR_TRUSTED_PREFIX) - 1;
const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
const size_t total_len = prefix_len + name_len + 1;
if (list && total_len <= list_size) {
@ -4771,18 +4811,14 @@ struct xattr_handler ocfs2_xattr_trusted_handler = {
.set = ocfs2_xattr_trusted_set,
};
/*
* 'user' attributes support
*/
#define XATTR_USER_PREFIX "user."
static size_t ocfs2_xattr_user_list(struct inode *inode, char *list,
size_t list_size, const char *name,
size_t name_len)
{
const size_t prefix_len = sizeof(XATTR_USER_PREFIX) - 1;
const size_t prefix_len = XATTR_USER_PREFIX_LEN;
const size_t total_len = prefix_len + name_len + 1;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);

38
fs/ocfs2/xattr.h
View File

@ -3,24 +3,16 @@
*
* xattr.h
*
* Function prototypes
*
* Copyright (C) 2008 Oracle. All rights reserved.
* Copyright (C) 2004, 2008 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
* License version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#ifndef OCFS2_XATTR_H
@ -40,29 +32,11 @@ enum ocfs2_xattr_type {
extern struct xattr_handler ocfs2_xattr_user_handler;
extern struct xattr_handler ocfs2_xattr_trusted_handler;
extern ssize_t ocfs2_listxattr(struct dentry *, char *, size_t);
extern int ocfs2_xattr_get(struct inode *, int, const char *, void *, size_t);
extern int ocfs2_xattr_set(struct inode *, int, const char *, const void *,
size_t, int);
extern int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh);
extern struct xattr_handler *ocfs2_xattr_handlers[];
static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb)
{
return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE;
}
ssize_t ocfs2_listxattr(struct dentry *, char *, size_t);
int ocfs2_xattr_set(struct inode *, int, const char *, const void *,
size_t, int);
int ocfs2_xattr_remove(struct inode *, struct buffer_head *);
static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb)
{
return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits);
}
static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb)
{
u16 len = sb->s_blocksize -
offsetof(struct ocfs2_xattr_header, xh_entries);
return len / sizeof(struct ocfs2_xattr_entry);
}
#endif /* OCFS2_XATTR_H */